7819 IPv6 Packet and MTU bug

*** 22,32 ****
  /*
   * Copyright (c) 1990 Mentat Inc.
   * Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2012, Joyent, Inc. All rights reserved.
   * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
!  * Copyright 2014, OmniTI Computer Consulting, Inc. All rights reserved.
   */
  
  #ifndef _INET_IP_H
  #define _INET_IP_H
  
--- 22,32 ----
  /*
   * Copyright (c) 1990 Mentat Inc.
   * Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2012, Joyent, Inc. All rights reserved.
   * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
!  * Copyright 2017 OmniTI Computer Consulting, Inc. All rights reserved.
   */
  
  #ifndef _INET_IP_H
  #define _INET_IP_H
  
*** 549,559 ****
   * dce_ident is always present, but the other ones are identified by the flags.
   */
  #define DCEF_DEFAULT            0x0001  /* Default DCE - no pmtu or uinfo */
  #define DCEF_PMTU               0x0002  /* Different than interface MTU */
  #define DCEF_UINFO              0x0004  /* dce_uinfo set */
! #define DCEF_TOO_SMALL_PMTU     0x0008  /* Smaller than IPv4/IPv6 MIN */
  
  #ifdef _KERNEL
  /*
   * Extra structures need for per-src-addr filtering (IGMPv3/MLDv2)
   */
--- 549,559 ----
   * dce_ident is always present, but the other ones are identified by the flags.
   */
  #define DCEF_DEFAULT            0x0001  /* Default DCE - no pmtu or uinfo */
  #define DCEF_PMTU               0x0002  /* Different than interface MTU */
  #define DCEF_UINFO              0x0004  /* dce_uinfo set */
! #define DCEF_TOO_SMALL_PMTU     0x0008  /* Smaller than IPv4 MIN */
  
  #ifdef _KERNEL
  /*
   * Extra structures need for per-src-addr filtering (IGMPv3/MLDv2)
   */